Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf96abf6174ee73be7daba3ef7dbd5a748f435f29c86b7b03806b766f3a14489' 
  AND token = 'QtyjD7BIfI65k2sHhwzGay99McQmfKD8EHTZnb36qOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}